Temperature and substrate on the germination of seeds of<i>Simira gardneriana</i>M.R. Barbosa &amp; Peixoto

Oliveira, Fabrícia Nascimento de; França, Francisco Diorge de; Torres, Salvador Barros; Nogueira, Narjara Walessa; Freitas, Rômulo Magno Oliveira de

doi:10.5935/1806-6690.20160079

Cited by 8 publications

(7 citation statements)

References 14 publications

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“…In general, seeds of subtropical and tropical species germinate at 20-30 °C (Oliveira et al, 2016;Silva et al, 2016). The germination behavior of M. brauna seeds observed in the current study agrees with that reported in the literature.…”

Section: Resultsmentioning

confidence: 99%

Enzyme activity in the micropylar region of Melanoxylon brauna Schott seeds during germination under heat stress conditions

et al. 2020

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Recent studies indicate that global temperatures will rise substantially in the 21st century, leading to the extinction of several plant species, as plant metabolism and germination are greatly affected by temperature. Melanoxylon brauna, a tree species native to the Atlantic Forest that occurs from northeastern to southeastern Brazil, is one of the many species threatened by global warming. Despite the economic and ecological importance of M. brauna, studies investigating the influence of heat stress on seed germination and biochemical responses are still incipient. This study aimed to evaluate enzyme activity in the micropylar region of M. brauna seeds during germination under heat stress conditions. Endo-β-mannanase, α-galactosidase, polygalacturonase, pectin methylesterase, pectin lyase, total cellulase, 1,3-β-glucosidase, and 1,4-β-glucosidase activities were determined in micropyles of seeds imbibed for 24, 48 and 72 h at 25, 35 and 45 °C. Seed germination was highest at 25 °C. Endo-β-mannanase activity was not detected under any of the experimental conditions, but imbibition temperature had a significant effect on the activity of all other enzymes.

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Section: Resultsmentioning

confidence: 99%

Enzyme activity in the micropylar region of Melanoxylon brauna Schott seeds during germination under heat stress conditions

et al. 2020

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“…Sementes de milho doce apresentam rápida perda de viabilidade e suscetibilidade ao ataque de fungos e insetos devido sua composição química e morfologia, reduzindo drasticamente a qualidade final. Logo, o tratamento de sementes é um dos mais rentáveis e adequado método de controle, pois protege as sementes desde a semeadura, desempenhando papel fundamental para o sucesso da emergência de plântulas de maneira uniforme em condições normais ou adversas (Oliveira, 2016).…”

Section: Introductionunclassified

Sementes de milho doce tratadas: substratos para o teste de germinação e sanidade

Bersch

Figueiredo

Rossetti

et al. 2021

RSD

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Resultante de uma mutação espontânea do milho convencional, o milho doce possui elevado potencial de produtividade no Brasil, sendo considerado alternativa rentável aos produtores, e o colocando em ascensão. Contudo, a escassez de informações técnicas reduz este avanço. A fim de analisar a viabilidade da semente, o teste de germinação em laboratório é utilizado para comparar a qualidade entre lotes e estimar seu desempenho para semeadura em campo. Suscetível ao ataque por fungos e insetos, devido sua composição e características morfológicas, o tratamento de sementes de milho doce com produtos químicos é uma opção viável para reduzir possíveis perdas de qualidade. Desse modo, analisou-se a incidência de fungos fitopatogênicos, bem como sua redução devido ao uso de fungicidas no TS. Porém, para o teste de germinação, pode-se encontrar antagonismo do valor obtido para sementes tratadas, relacionado ao desempenho destas sementes a campo. A fim de elucidar e corrigir estes erros realizou-se um estudo das condições que os propiciam e definiram-se soluções para o problema, adequando às metodologias utilizadas na realização dos testes de germinação.

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“…Substrate directly influences germination by providing physical support for the seeds and adequate conditions, such as structure, aeration and water availability, not only for germination but also for the subsequent development of seedlings (Oliveira, França, Torres, Nogueira, & Freitas, 2016). Temperature is another important factor for germination because it directly influences the biochemical reactions that regulate the metabolism of the germination process and, consequently, influences germination speed and final germination percentage (Gonçalves et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Temperatures and substrates for germination and vigor of <i>Erythroxylum pauferrense</i> Plowman seeds

Ribeiro

Leite

Nóbrega

et al. 2019

Acta Sci. Biol. Sci.

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Erythroxylum pauferrense is an endemic understory plant species of the Northeast Region of Brazil. The species is of great importance to the region and so ecophysiological studies are needed for its preservation. The objective of the present study was to determine the best substrates and temperatures for testing germination and seed vigor of E. pauferrense. An experiment was performed comprising a completely randomized design in a 5 x 4 factorial scheme, with five temperature regimes (20, 25, 30, 35°C constant and 20-30°C alternating) and four types of substrates (paper, vermiculite, sand and commercial substrate). The following characteristics were evaluated: germination percentage, first germination count, germination speed index, mean germination time, seedling length and dry mass (root and shoot). Paper and vermiculite substrates combined with constant temperatures of 20, 25, 30 and alternated between 20-30°C, provide greater seed germination and vigor while 35°C reduces seed physiological quality.

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Temperature and substrate on the germination of seeds ofSimira gardnerianaM.R. Barbosa & Peixoto

Cited by 8 publications

References 14 publications

Enzyme activity in the micropylar region of Melanoxylon brauna Schott seeds during germination under heat stress conditions

Enzyme activity in the micropylar region of Melanoxylon brauna Schott seeds during germination under heat stress conditions

Sementes de milho doce tratadas: substratos para o teste de germinação e sanidade

Temperatures and substrates for germination and vigor of <i>Erythroxylum pauferrense</i> Plowman seeds

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